 // 实例高德图层
 var gaodeMapLayer = new ol.layer.Tile({
  title: "高德地图",
  source: new ol.source.XYZ({
      url: 'http://wprd0{1-4}.is.autonavi.com/appmaptile?lang=zh_cn&size=1&style=7&x={x}&y={y}&z={z}',
      wrapX: false,
      crossOrigin: "Anonymous"
  })
});

